Answer:
I think its cell membranes
Please correct me if I am wrong thank you
Explanation:
It contracts hope that helps
It serves to polarization by transmission through a filter. <span>A Polaroid filter is a device used to polarize light. The device filters out one-half of the vibrations of unpolarized light as the light passes through the filter. Unpolarized light enters the Polaroid filter and the polarized light goes out from the filter. The unpolarized light becomes polarized.</span>
A. Thst is what they are doing xD
The point straight overhead on the celestial sphere for any observer is called the zenith and is always 90 degrees from the horizon. :) I hope this helped !